What’s the problem with that, though? Systems like that are pretty much guaranteed to be isolated from the internet.
Because things break down eventually, and when it comes time to buy replacement parts you discover that they’re effectively impossible to find. Then instead of having a nice, planned transition period you’ve got like a weekend to cobble together something to get it working again.
Hardware that runs DOS well isn’t that hard to find though. There’s even new modern-ish motherboards designed for embedded systems (like robots that control production lines) that still have ISA and PCI slots to support legacy hardware, since those embedded systems are designed to last a very long time.
For what it’s worth, I know that some places that run old systems like that have virtualized it - they have much newer systems and run the old software in a VM.
Because things break down eventually, and when it comes time to buy replacement parts you discover that they’re effectively impossible to find. Then instead of having a nice, planned transition period you’ve got like a weekend to cobble together something to get it working again.
Hardware that runs DOS well isn’t that hard to find though. There’s even new modern-ish motherboards designed for embedded systems (like robots that control production lines) that still have ISA and PCI slots to support legacy hardware, since those embedded systems are designed to last a very long time.
For what it’s worth, I know that some places that run old systems like that have virtualized it - they have much newer systems and run the old software in a VM.